Concrete-form-clamping device



April 22, 1930.

s. s. COLT 1,755,284

CONCRETE FORM GLAMPING DEVICE Filed May 29. 1928 s Sheets-Sheet i am/yaw ATTORNEY A ril 22, 1930. s. s, COLT 1,755,284

CONCRETE FORM CLAMPING DEVICE Filed May 29, 1928 s She ets-Sheet 2 TTORNEY April 22, 1930. s, s. coL 1,755,284

CONCRETE FORM CLAMPING DEVICE Filed May 29, 1928 3' Sheets-Sheet 3 INVENTOR iamue/ i F6/% ATTORNEY [:25 will :40 horizontal section, taken onv in "45 "bodyingthe principleslof thisinvention ;,and

cate corresponding partsg Patented 1930 i, v

SAMUEL OFAORANGE,

I o eonqnmmom mrma1mm 1 The present invention-hasfor' its principal object {to provide in a combination with a 1 adj ustable clamping lzdevices novel construetion' and arrangement of cooperative tighten ing'wedges-together witha novel means-"for 11 locking said;- wedges in" adjusted set-uplpositions relativejtoi theg-said' clamping devices. -The invention also: has-for an object to provide an associatedfrelation of clamps-bar 7 tightening wedge so'arr'anged that the latter is retained inassembledrelation to thegfor' jmer and'yet free for Operative movementrelw. 'tive thereto, V- 1 Y Other objects-0f the present invention, not

at this time more particularly. enumerated,

v be clearly understood from the following detailedgdescription of-the sameiiiw 1f The-present invention, is illustrated inthe accompanying-drawings, in which H Y Figure1;is alplan-viewofone arrange-1 ment and construction of the novel adjust o i vable clamping devicesof this inventionoperati-vely related to assembled jform walls, the latter being shown in horizontal section Fig. 2 is a side elevation gofthe' -structure as ar ranged and showninfFig. f1, Figure 3 is a fragmentary} vertical section, taken on line 3-1 -3 in Fig.1,"but drawn on an enlarged scale; Fig 1 is a horizontal section, taken :on line LT- 1' inFig; 8'; and ig.5 is another;

Fig. 6is a fragmentary'plan view, show;- ing 'a modified"arrangement' and construe tion of the adjustable clamping devices eni- Fig. 7 is'a verticalsectionlthroughrthe same,

takenonline 7%? in Fig.' 6.i

Similar-"charactersof, reference are emploved in the above described views, to indirivets 1.6 extending through the. abutment vreference :character 10! indicates the "form t k wallsrso arranged as to provide .a'gfinold or storm of rectangular cross-section,i'suchxas' 7 would beemployedin pouring concrete columns and similarstructures;;.- v ,Thesclamping I devicesfor retaining the f; v formwalls 1O inoperative assembled; relation comprises, according'to the present vention, a set of four mutuallyiinterengage' p i r comprises .a; stretcher or bar "made? of flat steel'or other-suitable material, Connected.

.withwone'endportion of each stretcher or bar i 1'-1,'and in overlying parallel; relation thereto is aclip block 12 cutaway at'its underside to provide a transverse opening or passage 18 bounded-at one, or the outer side thereof -1; by an abutmentmember' l lhaving'ja footing on the face of the stretcheror bar '11 andat theE-stretcher or bar '11. Said clip block is rigidly securedtothestretcher orbar; '11 by;

member "island underlying portion of the stretcher-.orba and also-by a r ive't-17fezi 1 tending throughthe spacing boss 15 and ther portion ofsaidstretcher or bar which underlies the same,v The spacing boss 15' -may=be 580 V omitted if, desired leaving the endof the passage or slot- 13 open. It willfbe obvious that other,;means of. fastening said clip block'and I stretcher or bar together may be utilized, the above described" means being merely illusrative one one practical arrangement inthis' respect? In assembling thestretchers orbars 11" t6}; gether around the iormwalls 10, the free end, of one such stretcheror bar ispassed't-hrou'gh; 9

Opening or passage 3 eneath ileum block 12 of, an adjacent stretcher ,or bar,4in the manner clearly indicated in the accom V panying drawings. Assembled with each stretcher orbar 11, so asto be, transversely 9 movable through the openingor passage 13;,

a position intermediate the abutment member :14; and the assembled lrandi portion of an adjacent'stretcher orbar, is a -tighten-' Y ingwedge 18 havingaan oblique orinclinedslfl s ,able-clamping bars 11;;TEachclamping bar; a

I the otheror'inner side thereofby a spacing v 1 boss 15 also having a footing onthe'faceof operative relation to the stretcher or bar wlthmargin 19 at its outer side. The inner face of the abutment member 14 is also formed to provide an oblique meeting face 20 corre sponding to the oblique side 19 of the wedge, and against which the latter thrusts when actuated. It is also of advantage to laterally chamfer the oblique or inclined margin 19 of said Wedge in a downward and outward direction from its top face and to correspondingly chamfer the oblique meeting face 20 of the abutment member 14, such c0nstruction tending to maintain the wedge flat on a surface of-the stretcher or bar 11 when actuating the same in service. In orderto retain the wedge in non-separable and yet Which it is associated, I provide in the upper face of the wedge body a countersunk cavity which provides keeper shoulders 21 operative in the manner subsequently explained.

The means for locking the wedge 18 in any desired operative position to which it has V thereunder, with an opening or slot 25 through which said gripping member or stud 24 extends, whereby the free extremity of the latter may be caused-to bear bitingly on the upper surface of said wedge 18 and within the boundaries of the keeper shoulders 21 thereof. Said gripping member or'stud 24 may be provided, adjacent its free end, with a laterally projecting tongue or lug 26, which,

when the parts are assembled together, will extend under the marginal portion of the opening or slot 25 to thereby prevent accidentel upward displacement of the gripper piece 22 and its gripping member or stud 24. Extending upwardly through the assembled stretcher or bar 11 and attached clip-block 12 is a connecting bolt- 27, the squared head of which is preferably countersunk somewhat in the body of the stretcher or bar to hold the same againstturning. The rear end of said gripper piece 22 is bifurcated,- as at 28, to permit the free threaded end of said bolt 27 to pass upwardly therethrough.

Arranged on said threaded end of said bolt 27 is a wing-nut 29 which may be tightened down on the gripper piece 22. If desired a cross-pin 30'may be passedthrough the free end portion of the bolt 27 above the wing-nut 29 to limit the loosening movement thereof, so that while it maybe manipulated to loosen or tighten the. gripper piece and its gripping member or stud 24 relative to the wedge 18, yet the parts cannot become accidentally disassembled or lost. i Since the gripping memher or stud 24 enters the cavity of the wedge 18, bounded by the keepershoulders 21, and is maintainedflin. such position even when the gripper piece is loosened, it follows that the wedge under the latter condition is free to move and yet cannot be accidentally lost since the shoulders. 21 will stop the wedge atsome point before it can escape the opening or passage of the clip-block 12.

Furthermore, the arrangement of the wedge,thus retained in operative assembled relation to the clamping devices issuch that, whenthe latterare not in use, the wedges may be turned or folded into the opening or passage 13, and then. locked in such arrangement,"so"that the stretchers 'or bars may becompactly bundled together for storage or for carriage from place toplace.

When operativelyassembling the clamping devices in encircling and holding relation to angularly disposed forniwalls 10,.the series of stretchers or bars 11 are arranged at right angles one toqthe other against the outer faces of the latter, with the, freeend ofone stretcher. or bar engaged through the V .90 opening or'passage 13 of the clip'block 12 of the next adjoining stretcher orbar,3and so as to lie intermediate the abutting form wall and the wedge 18 of the latter, stretcher or bar, the wedges being initiallyv withdrawn to loosened relation. Whenthe. parts are thus assembled relative to the form to be clamped thereby, holding'pins,"preferably in the form of split cotter pins 31, are inserted through a selected topening or perforation 32 of a longitudinal row thereof provided in the free ends of the stretchers or bars 11, whereby said pins are located at the outer sides ofadjacent interengaged stretchers or' bars to thereby prevent disassembling of the thus interconnected clamping devices.

' When the parts are thus disposed, the clamping devices are ready to be finally tightened up and locked in closev gripping relation to the form walls. The latter operation is. attained'by driving home the, wedges, 18, thus taking. up all slack in the form encircling clamping devices, and thereby securing a snug andtight gripping and embracing relation of the latter to the form. ;After the wedges 18 are thus driven home to operative tightening position, .the previously loosened wing-nuts 29 are screwed down on the bolts 27, thus pressingdown on the gripper pieces 22, as fulcrumed on'their shoulders 23, and thereby thrusting downwardly the gripping members 24 intobiting and holding engagement with the wedges, all whereby said adjusted and tightened wedges are firmly gripped andheld against back-slipping or displacement from their operative thrusting relat-ionto the associated stretcher or 11, and thus securely retaining the clamping devices against accidental displacement from operative form clamping positions.

Attention may here be called toalconvene ient means providedin connection with the clip-block 12from holding the cotter pins 31, when'not in use," and also for spreading said pins when it 'isdesired so to do. For

these purposes, the outer end of the clip block is provided with a'flcavity 33 bounded at its upper side by a chamfered or chisel edged wall 34, and through this end 'ofthe clip-block GX- tend transverse openings35. The openings 35 serve to recelve and hold a cotter pin, 31, when the same is notin use, thus assurlng its presence when needed (as shown in'Figs. 3

and :4) the chisel edged wall 34 may be utilized to engage between and spread'the arms of the pin 3lsto allow. for outward spreading tension thereof whenused (this being shown I u by dotted lines in Fig. 3). a

From theabove descriptionit willbe obvious that the wedges 18 may be adjusted to a nice degree of tightness, and that when so adjusted the gripping members may be caused to quickly engage and securely hold the same in the positions to, which theyjhave been adjustably tightened. r Referring now to Figs.v 63and 7 I have shownther'ein a somewhat modified arrangement and construction of wedge locking. means, which embodies, however, the pun-- ciples of this invention. In this construction I'omit' the separate rigidly secu'ring' rivets 16 from'the outer endof the clip block- 12, and also omit the separable gripper'piece; 22, substituting for the'latter a set-screw 36 mounted in the wall of the clip block 12 so as to project downwardly into the under lying opening or passage 13 into engagement with the wedge 18. A jamb nut 37 may be utilized to' lock the set-screw in desired position, As shown in Figs, 6 .and 7 a'bolt 38 is extended through'the outer end of the clip block and through theunderlying stretcher or bar 11, its threaded end being supplied with a wing-nut 39. When the wedge-18 has been adjusted to tightened position the wingnut 39 is manipulated'to draw'down the clipblock thus carrying the set-screw 36into bitingand holding relation to-the wedge. It

will also be understood, that the clip block 12 may be rigidly secured to the stretcher or bar "11, and the set-screw alone manipulated to tightened or loosenedposition, to lock or free z'the wedge 18 as desired.

I amaware that changes, other than those above mentioned, may be'made in the abovedescribed clamping devices, as well'as in the details of the construction of the same, without departing from the scope of this invention as described in the foregoing specifica-' tion, and as defined in the appended claims. 'Hence, I do not limit my present invention tothe exactarrangements and combinations of the devices and parts as 'set'forth in the foregoing specification, nor do'I'confine myself to the exact details of the construction 'tion in a'face thereof bounded by keeper" "0f S'aid paTtEi as illustratedin theacofiipany- @lclaim: Q

l. Ina;fornr elamping device,a clampfbar structure havi ig -nl'eaiisat one end to :mount a tightening wedge for operative movement relativethereto and meanstoreceive the" end a of a' cooperatin'glclamp barto dispose the 7 same Z between: saidqwedge 5' and the .form to 1 which the, "clamping device is applied, said wedgemounting means having a releasablc V gripping means enga'ge'able with saidwedge to lock the same in desired operative position, and said wedge having a depressed porshoulders adapted to cooperate with. said gripping-means when the latter is loosened to thereby retain :saidwedge in assembled rela: tion" to said clamp bar structure.

2. A form clamping device,,comprising mutuallyinterengageable clamp bar struc- I tures adapted to bemounted in encircling re: lation to a form to be held thereby, each q clamp bar structure having at one end arpas- :sage forming means provided with a wedge thrust abutment, a tighten-wedge movable going endwise through said passage forming means and against said thrust abutment, said pas.

sage forming means of one clamp bar st ruc- I .ture being adapted toreceive a portion of an adjacent clamp bar structure for disposition between .said wedge and the form 'to which the clampingdeviceis applied, and a releasable gripping means carried by each. clamp j said gripping means being engageable with i bar structure and passage forming means,

said wedge to lock the same in desired operative position;

3. A form clamping device as character-' I ized in claim 2, in which said wedge is provided with-a laterally bevelededge and said thrust abutment is provided with an underi cut beveled edge to cooperate therewith.

"4:, A form clamping device, comprising mutually interengageable clamp bar struc tures adapted to-be mounted in encircling re-- lation to a form to beheld thereby, each clamp 'bar structure having at one end a passage forming means provided with a wedge thrust abutment, a tighten-wedgeing meansand against said thrust abutment, said passage formmg means of' one" clamp "barstructure being adaptedto receive a portion of an adjacent clamp bar structure for disposition between said wedgeand the form 'to which the clamping device is applied, a

oper t with said gripping means w the movable endwise through said passage form- Y latter is loosened to thereby retain said wedge in assembled relation to said clamp bar structure. I

5. A form clamping device as characterized in claim 4, in which said wedge is pro-v vided with a laterally beveled edge and said thrust abutment is provided with anundercut beveled edge to cooperate therewith.

' In testimony that I claim the invention set forth above I have hereunto set my hand this 24th day of May, 1928.

' SAMUEL S. COLT. 

